Merge pull request #5991 from gyuho/manual

v2http: client certificate auth via common name

e2e/ctl_v2_test.go

@@ -276,6 +276,42 @@ func TestCtlV2Backup(t *testing.T) { // For https://github.com/coreos/etcd/issue
 	}
 }
 
+func TestCtlV2AuthWithCommonName(t *testing.T) {
+	defer testutil.AfterTest(t)
+
+	copiedCfg := configClientTLS
+	copiedCfg.clientCertAuthEnabled = true
+
+	epc := setupEtcdctlTest(t, &copiedCfg, false)
+	defer func() {
+		if err := epc.Close(); err != nil {
+			t.Fatalf("error closing etcd processes (%v)", err)
+		}
+	}()
+
+	if err := etcdctlRoleAdd(epc, "testrole"); err != nil {
+		t.Fatalf("failed to add role (%v)", err)
+	}
+	if err := etcdctlRoleGrant(epc, "testrole", "--rw", "--path=/foo"); err != nil {
+		t.Fatalf("failed to grant role (%v)", err)
+	}
+	if err := etcdctlUserAdd(epc, "root", "123"); err != nil {
+		t.Fatalf("failed to add user (%v)", err)
+	}
+	if err := etcdctlUserAdd(epc, "Autogenerated CA", "123"); err != nil {
+		t.Fatalf("failed to add user (%v)", err)
+	}
+	if err := etcdctlUserGrant(epc, "Autogenerated CA", "testrole"); err != nil {
+		t.Fatalf("failed to grant role (%v)", err)
+	}
+	if err := etcdctlAuthEnable(epc); err != nil {
+		t.Fatalf("failed to enable auth (%v)", err)
+	}
+	if err := etcdctlSet(epc, "foo", "bar"); err != nil {
+		t.Fatalf("failed to write (%v)", err)
+	}
+}
+
 func etcdctlPrefixArgs(clus *etcdProcessCluster) []string {
 	endpoints := ""
 	if proxies := clus.proxies(); len(proxies) != 0 {
@@ -348,6 +384,13 @@ func etcdctlRoleAdd(clus *etcdProcessCluster, role string) error {
 	return spawnWithExpect(cmdArgs, role)
 }
 
+func etcdctlRoleGrant(clus *etcdProcessCluster, role string, perms ...string) error {
+	cmdArgs := append(etcdctlPrefixArgs(clus), "role", "grant")
+	cmdArgs = append(cmdArgs, perms...)
+	cmdArgs = append(cmdArgs, role)
+	return spawnWithExpect(cmdArgs, role)
+}
+
 func etcdctlRoleList(clus *etcdProcessCluster, expectedRole string) error {
 	cmdArgs := append(etcdctlPrefixArgs(clus), "role", "list")
 	return spawnWithExpect(cmdArgs, expectedRole)

e2e/etcd_test.go

@@ -150,6 +150,7 @@ type etcdProcessClusterConfig struct {
 	snapCount int // default is 10000
 
 	clientTLS             clientConnType
+	clientCertAuthEnabled bool
 	isPeerTLS             bool
 	isPeerAutoTLS         bool
 	isClientAutoTLS       bool
@@ -325,6 +326,10 @@ func (cfg *etcdProcessClusterConfig) tlsArgs() (args []string) {
 				"--ca-file", caPath,
 			}
 			args = append(args, tlsClientArgs...)
+
+			if cfg.clientCertAuthEnabled {
+				args = append(args, "--client-cert-auth")
+			}
 		}
 	}
 

embed/etcd.go

@@ -116,6 +116,7 @@ func StartEtcd(inCfg *Config) (e *Etcd, err error) {
 		QuotaBackendBytes:       cfg.QuotaBackendBytes,
 		StrictReconfigCheck:     cfg.StrictReconfigCheck,
 		EnablePprof:             cfg.EnablePprof,
+		ClientCertAuthEnabled:   cfg.ClientTLSInfo.ClientCertAuth,
 	}
 
 	if e.Server, err = etcdserver.NewServer(srvcfg); err != nil {

etcdserver/api/v2http/client.go

@@ -70,6 +70,7 @@ func NewClientHandler(server *etcdserver.EtcdServer, timeout time.Duration) http
 		cluster:               server.Cluster(),
 		timer:                 server,
 		timeout:               timeout,
+		clientCertAuthEnabled: server.Cfg.ClientCertAuthEnabled,
 	}
 
 	sh := &statsHandler{
@@ -82,6 +83,7 @@ func NewClientHandler(server *etcdserver.EtcdServer, timeout time.Duration) http
 		cluster: server.Cluster(),
 		timeout: timeout,
 		clock:   clockwork.NewRealClock(),
+		clientCertAuthEnabled: server.Cfg.ClientCertAuthEnabled,
 	}
 
 	dmh := &deprecatedMachinesHandler{
@@ -91,6 +93,7 @@ func NewClientHandler(server *etcdserver.EtcdServer, timeout time.Duration) http
 	sech := &authHandler{
 		sec:                   sec,
 		cluster:               server.Cluster(),
+		clientCertAuthEnabled: server.Cfg.ClientCertAuthEnabled,
 	}
 
 	mux := http.NewServeMux()
@@ -137,6 +140,7 @@ type keysHandler struct {
 	cluster               api.Cluster
 	timer                 etcdserver.RaftTimer
 	timeout               time.Duration
+	clientCertAuthEnabled bool
 }
 
 func (h *keysHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
@@ -156,7 +160,7 @@ func (h *keysHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	// The path must be valid at this point (we've parsed the request successfully).
-	if !hasKeyPrefixAccess(h.sec, r, r.URL.Path[len(keysPrefix):], rr.Recursive) {
+	if !hasKeyPrefixAccess(h.sec, r, r.URL.Path[len(keysPrefix):], rr.Recursive, h.clientCertAuthEnabled) {
 		writeKeyNoAuth(w)
 		return
 	}
@@ -204,13 +208,14 @@ type membersHandler struct {
 	cluster               api.Cluster
 	timeout               time.Duration
 	clock                 clockwork.Clock
+	clientCertAuthEnabled bool
 }
 
 func (h *membersHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	if !allowMethod(w, r.Method, "GET", "POST", "DELETE", "PUT") {
 		return
 	}
-	if !hasWriteRootAccess(h.sec, r) {
+	if !hasWriteRootAccess(h.sec, r, h.clientCertAuthEnabled) {
 		writeNoAuth(w, r)
 		return
 	}

etcdserver/api/v2http/client_auth.go

@@ -28,16 +28,54 @@ import (
 type authHandler struct {
 	sec                   auth.Store
 	cluster               api.Cluster
+	clientCertAuthEnabled bool
 }
 
-func hasWriteRootAccess(sec auth.Store, r *http.Request) bool {
+func hasWriteRootAccess(sec auth.Store, r *http.Request, clientCertAuthEnabled bool) bool {
 	if r.Method == "GET" || r.Method == "HEAD" {
 		return true
 	}
-	return hasRootAccess(sec, r)
+	return hasRootAccess(sec, r, clientCertAuthEnabled)
 }
 
-func hasRootAccess(sec auth.Store, r *http.Request) bool {
+func userFromBasicAuth(sec auth.Store, r *http.Request) *auth.User {
+	username, password, ok := r.BasicAuth()
+	if !ok {
+		plog.Warningf("auth: malformed basic auth encoding")
+		return nil
+	}
+	user, err := sec.GetUser(username)
+	if err != nil {
+		return nil
+	}
+
+	ok = sec.CheckPassword(user, password)
+	if !ok {
+		plog.Warningf("auth: incorrect password for user: %s", username)
+		return nil
+	}
+	return &user
+}
+
+func userFromClientCertificate(sec auth.Store, r *http.Request) *auth.User {
+	if r.TLS == nil {
+		return nil
+	}
+
+	for _, chains := range r.TLS.VerifiedChains {
+		for _, chain := range chains {
+			plog.Debugf("auth: found common name %s.\n", chain.Subject.CommonName)
+			user, err := sec.GetUser(chain.Subject.CommonName)
+			if err == nil {
+				plog.Debugf("auth: authenticated user %s by cert common name.", user.User)
+				return &user
+			}
+		}
+	}
+	return nil
+}
+
+func hasRootAccess(sec auth.Store, r *http.Request, clientCertAuthEnabled bool) bool {
 	if sec == nil {
 		// No store means no auth available, eg, tests.
 		return true
@@ -45,30 +83,30 @@ func hasRootAccess(sec auth.Store, r *http.Request) bool {
 	if !sec.AuthEnabled() {
 		return true
 	}
-	username, password, ok := r.BasicAuth()
+
-	if !ok {
+	var rootUser *auth.User
+	if r.Header.Get("Authorization") == "" && clientCertAuthEnabled {
+		rootUser = userFromClientCertificate(sec, r)
+		if rootUser == nil {
 			return false
 		}
-	rootUser, err := sec.GetUser(username)
+	} else {
-	if err != nil {
+		rootUser = userFromBasicAuth(sec, r)
+		if rootUser == nil {
 			return false
 		}
+	}
 
-	ok = sec.CheckPassword(rootUser, password)
-	if !ok {
-		plog.Warningf("auth: wrong password for user %s", username)
-		return false
-	}
 	for _, role := range rootUser.Roles {
 		if role == auth.RootRoleName {
 			return true
 		}
 	}
-	plog.Warningf("auth: user %s does not have the %s role for resource %s.", username, auth.RootRoleName, r.URL.Path)
+	plog.Warningf("auth: user %s does not have the %s role for resource %s.", rootUser.User, auth.RootRoleName, r.URL.Path)
 	return false
 }
 
-func hasKeyPrefixAccess(sec auth.Store, r *http.Request, key string, recursive bool) bool {
+func hasKeyPrefixAccess(sec auth.Store, r *http.Request, key string, recursive, clientCertAuthEnabled bool) bool {
 	if sec == nil {
 		// No store means no auth available, eg, tests.
 		return true
@@ -76,25 +114,21 @@ func hasKeyPrefixAccess(sec auth.Store, r *http.Request, key string, recursive b
 	if !sec.AuthEnabled() {
 		return true
 	}
-	if r.Header.Get("Authorization") == "" {
+
+	var user *auth.User
+	if r.Header.Get("Authorization") == "" && clientCertAuthEnabled {
+		user = userFromClientCertificate(sec, r)
+		if user == nil {
 			plog.Warningf("auth: no authorization provided, checking guest access")
 			return hasGuestAccess(sec, r, key)
 		}
-	username, password, ok := r.BasicAuth()
+	} else {
-	if !ok {
+		user = userFromBasicAuth(sec, r)
-		plog.Warningf("auth: malformed basic auth encoding")
+		if user == nil {
 			return false
 		}
-	user, err := sec.GetUser(username)
-	if err != nil {
-		plog.Warningf("auth: no such user: %s.", username)
-		return false
-	}
-	authAsUser := sec.CheckPassword(user, password)
-	if !authAsUser {
-		plog.Warningf("auth: incorrect password for user: %s.", username)
-		return false
 	}
+
 	writeAccess := r.Method != "GET" && r.Method != "HEAD"
 	for _, roleName := range user.Roles {
 		role, err := sec.GetRole(roleName)
@@ -109,7 +143,7 @@ func hasKeyPrefixAccess(sec auth.Store, r *http.Request, key string, recursive b
 			return true
 		}
 	}
-	plog.Warningf("auth: invalid access for user %s on key %s.", username, key)
+	plog.Warningf("auth: invalid access for user %s on key %s.", user.User, key)
 	return false
 }
 
@@ -145,7 +179,7 @@ func (sh *authHandler) baseRoles(w http.ResponseWriter, r *http.Request) {
 	if !allowMethod(w, r.Method, "GET") {
 		return
 	}
-	if !hasRootAccess(sh.sec, r) {
+	if !hasRootAccess(sh.sec, r, sh.clientCertAuthEnabled) {
 		writeNoAuth(w, r)
 		return
 	}
@@ -209,7 +243,7 @@ func (sh *authHandler) forRole(w http.ResponseWriter, r *http.Request, role stri
 	if !allowMethod(w, r.Method, "GET", "PUT", "DELETE") {
 		return
 	}
-	if !hasRootAccess(sh.sec, r) {
+	if !hasRootAccess(sh.sec, r, sh.clientCertAuthEnabled) {
 		writeNoAuth(w, r)
 		return
 	}
@@ -293,7 +327,7 @@ func (sh *authHandler) baseUsers(w http.ResponseWriter, r *http.Request) {
 	if !allowMethod(w, r.Method, "GET") {
 		return
 	}
-	if !hasRootAccess(sh.sec, r) {
+	if !hasRootAccess(sh.sec, r, sh.clientCertAuthEnabled) {
 		writeNoAuth(w, r)
 		return
 	}
@@ -365,7 +399,7 @@ func (sh *authHandler) forUser(w http.ResponseWriter, r *http.Request, user stri
 	if !allowMethod(w, r.Method, "GET", "PUT", "DELETE") {
 		return
 	}
-	if !hasRootAccess(sh.sec, r) {
+	if !hasRootAccess(sh.sec, r, sh.clientCertAuthEnabled) {
 		writeNoAuth(w, r)
 		return
 	}
@@ -478,7 +512,7 @@ func (sh *authHandler) enableDisable(w http.ResponseWriter, r *http.Request) {
 	if !allowMethod(w, r.Method, "GET", "PUT", "DELETE") {
 		return
 	}
-	if !hasWriteRootAccess(sh.sec, r) {
+	if !hasWriteRootAccess(sh.sec, r, sh.clientCertAuthEnabled) {
 		writeNoAuth(w, r)
 		return
 	}

etcdserver/api/v2http/client_auth_test.go

@@ -15,9 +15,13 @@
 package v2http
 
 import (
+	"crypto/tls"
+	"crypto/x509"
 	"encoding/json"
+	"encoding/pem"
 	"errors"
 	"fmt"
+	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -440,6 +444,32 @@ func mustAuthRequest(method, username, password string) *http.Request {
 	return req
 }
 
+func unauthedRequest(method string) *http.Request {
+	req, err := http.NewRequest(method, "path", strings.NewReader(""))
+	if err != nil {
+		panic("Cannot make request: " + err.Error())
+	}
+	return req
+}
+
+func tlsAuthedRequest(req *http.Request, certname string) *http.Request {
+	bytes, err := ioutil.ReadFile(fmt.Sprintf("testdata/%s.pem", certname))
+	if err != nil {
+		panic(err)
+	}
+
+	block, _ := pem.Decode(bytes)
+	cert, err := x509.ParseCertificate(block.Bytes)
+	if err != nil {
+		panic(err)
+	}
+
+	req.TLS = &tls.ConnectionState{
+		VerifiedChains: [][]*x509.Certificate{{cert}},
+	}
+	return req
+}
+
 func TestPrefixAccess(t *testing.T) {
 	var table = []struct {
 		key                string
@@ -690,14 +720,161 @@ func TestPrefixAccess(t *testing.T) {
 	}
 
 	for i, tt := range table {
-		if tt.hasRoot != hasRootAccess(tt.store, tt.req) {
+		if tt.hasRoot != hasRootAccess(tt.store, tt.req, true) {
 			t.Errorf("#%d: hasRoot doesn't match (expected %v)", i, tt.hasRoot)
 		}
-		if tt.hasKeyPrefixAccess != hasKeyPrefixAccess(tt.store, tt.req, tt.key, false) {
+		if tt.hasKeyPrefixAccess != hasKeyPrefixAccess(tt.store, tt.req, tt.key, false, true) {
 			t.Errorf("#%d: hasKeyPrefixAccess doesn't match (expected %v)", i, tt.hasRoot)
 		}
-		if tt.hasRecursiveAccess != hasKeyPrefixAccess(tt.store, tt.req, tt.key, true) {
+		if tt.hasRecursiveAccess != hasKeyPrefixAccess(tt.store, tt.req, tt.key, true, true) {
 			t.Errorf("#%d: hasRecursiveAccess doesn't match (expected %v)", i, tt.hasRoot)
 		}
 	}
 }
+
+func TestUserFromClientCertificate(t *testing.T) {
+	witherror := &mockAuthStore{
+		users: map[string]*auth.User{
+			"user": {
+				User:     "user",
+				Roles:    []string{"root"},
+				Password: "password",
+			},
+			"basicauth": {
+				User:     "basicauth",
+				Roles:    []string{"root"},
+				Password: "password",
+			},
+		},
+		roles: map[string]*auth.Role{
+			"root": {
+				Role: "root",
+			},
+		},
+		err: errors.New(""),
+	}
+
+	noerror := &mockAuthStore{
+		users: map[string]*auth.User{
+			"user": {
+				User:     "user",
+				Roles:    []string{"root"},
+				Password: "password",
+			},
+			"basicauth": {
+				User:     "basicauth",
+				Roles:    []string{"root"},
+				Password: "password",
+			},
+		},
+		roles: map[string]*auth.Role{
+			"root": {
+				Role: "root",
+			},
+		},
+	}
+
+	var table = []struct {
+		req        *http.Request
+		userExists bool
+		store      auth.Store
+		username   string
+	}{
+		{
+			// non tls request
+			req:        unauthedRequest("GET"),
+			userExists: false,
+			store:      witherror,
+		},
+		{
+			// cert with cn of existing user
+			req:        tlsAuthedRequest(unauthedRequest("GET"), "user"),
+			userExists: true,
+			username:   "user",
+			store:      noerror,
+		},
+		{
+			// cert with cn of non-existing user
+			req:        tlsAuthedRequest(unauthedRequest("GET"), "otheruser"),
+			userExists: false,
+			store:      witherror,
+		},
+	}
+
+	for i, tt := range table {
+		user := userFromClientCertificate(tt.store, tt.req)
+		userExists := user != nil
+
+		if tt.userExists != userExists {
+			t.Errorf("#%d: userFromClientCertificate doesn't match (expected %v)", i, tt.userExists)
+		}
+		if user != nil && (tt.username != user.User) {
+			t.Errorf("#%d: userFromClientCertificate username doesn't match (expected %s, got %s)", i, tt.username, user.User)
+		}
+	}
+}
+
+func TestUserFromBasicAuth(t *testing.T) {
+	sec := &mockAuthStore{
+		users: map[string]*auth.User{
+			"user": {
+				User:     "user",
+				Roles:    []string{"root"},
+				Password: "password",
+			},
+		},
+		roles: map[string]*auth.Role{
+			"root": {
+				Role: "root",
+			},
+		},
+	}
+
+	var table = []struct {
+		username   string
+		req        *http.Request
+		userExists bool
+	}{
+		{
+			// valid user, valid pass
+			username:   "user",
+			req:        mustAuthRequest("GET", "user", "password"),
+			userExists: true,
+		},
+		{
+			// valid user, bad pass
+			username:   "user",
+			req:        mustAuthRequest("GET", "user", "badpass"),
+			userExists: false,
+		},
+		{
+			// valid user, no pass
+			username:   "user",
+			req:        mustAuthRequest("GET", "user", ""),
+			userExists: false,
+		},
+		{
+			// missing user
+			username:   "missing",
+			req:        mustAuthRequest("GET", "missing", "badpass"),
+			userExists: false,
+		},
+		{
+			// no basic auth
+			req:        unauthedRequest("GET"),
+			userExists: false,
+		},
+	}
+
+	for i, tt := range table {
+		user := userFromBasicAuth(sec, tt.req)
+		userExists := user != nil
+
+		if tt.userExists != userExists {
+			t.Errorf("#%d: userFromBasicAuth doesn't match (expected %v)", i, tt.userExists)
+		}
+		if user != nil && (tt.username != user.User) {
+			t.Errorf("#%d: userFromBasicAuth username doesn't match (expected %s, got %s)", i, tt.username, user.User)
+		}
+	}
+}

etcdserver/api/v2http/testdata/ca.pem

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDEjCCAfqgAwIBAgIIYpX+8HgWGfkwDQYJKoZIhvcNAQELBQAwFTETMBEGA1UE
+AxMKZXRjZCB0ZXN0czAeFw0xNTExMjQwMzA1MDBaFw0yMDExMjIwMzA1MDBaMBUx
+EzARBgNVBAMTCmV0Y2QgdGVzdHMwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEK
+AoIBAQDa9PkwEwiBD8mB+VIKz5r5gRHnNF4Icj6T6R/RsdatecQe6vU0EU4FXtKZ
+drWnCGlATyrQooqHpb+rDc7CUt3mXrIxrNkcGTMaesF7P0GWxVkyOGSjJMxGBv3e
+bAZknBe4eLMi68L1aT/uYmxcp/B3L2mfdFtc1Gd6mYJpNm1PgilRyIrO0mY5ysIX
+4WHCa3yudAv8HrFbQcw7l7OyKA6uSWg6h07lE3d5jw5YOly+hz0iaRtzhb4tJrYD
+Lm1tehb0nnoLuW6yYblRSoyBVDT50MFVlyvW40Po5WkOXw/wnsnyxWRR4yqU23wq
+quQU0HXJEBLFnT+KbLOQ0EAE35vXAgMBAAGjZjBkMA4GA1UdDwEB/wQEAwIBBjAS
+BgNVHRMBAf8ECDAGAQH/AgECMB0GA1UdDgQWBBSbUCGB95ochDrbEZlzGGYuA7xu
+xjAfBgNVHSMEGDAWgBSbUCGB95ochDrbEZlzGGYuA7xuxjANBgkqhkiG9w0BAQsF
+AAOCAQEAardO/SGCu7Snz3YRBUinzpZEUFTFend+FJtBkxBXCao1RvTXg8PBMkza
+LUsaR4mLsGoXLIbNCoIinvVG0QULYCZe11N3l1L0G2g5uhEM4MfJ2rwrMD0o17i+
+nwNRRE3tfKAlWhYQg+4ye36kQVxASPniHjdQgjKYUFTNXdyG6DzuAclaVte9iVw6
+cWl61fB2CZya3+uMtih8t/Kgl2KbMO2PvNByfnDjKmW+v58qHbXyoJZqnpvDn14+
+p2Ox+AvvxYiEiUIvFdWy101QB7NJMCtdwq6oG6OvIOgXzLgitTFSq4kfWDfupQjW
+iFoQ+vWmYhK5ld0nBaiz+JmHuemK7A==
+-----END CERTIFICATE-----

etcdserver/api/v2http/testdata/otheruser.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

etcdserver/api/v2http/testdata/user.pem

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

etcdserver/config.go

@@ -56,6 +56,9 @@ type ServerConfig struct {
 	StrictReconfigCheck bool
 
 	EnablePprof bool
+
+	// ClientCertAuthEnabled is true when cert has been signed by the client CA.
+	ClientCertAuthEnabled bool
 }
 
 // VerifyBootstrap sanity-checks the initial config for bootstrap case